package com.jiyun.testlist.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.jiyun.model.Course;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

/* *
 * @Author nxj
 * @Date 2023 08 2023/8/4 10 43
 * */
@Mapper
public interface CourseMapper extends BaseMapper<Course> {

    @Select("select count(id) from course")
    Integer find1();

    
}
